diff --git a/nezha-fronted/src/components/charts/chart-alert-list.vue b/nezha-fronted/src/components/charts/chart-alert-list.vue
index 3de1fed2f..5705a7e40 100644
--- a/nezha-fronted/src/components/charts/chart-alert-list.vue
+++ b/nezha-fronted/src/components/charts/chart-alert-list.vue
@@ -935,7 +935,9 @@ export default {
       // this.$refs.alertListTable.$refs.alertListTable.clearSelection()
       // this.$refs.alertListScreenTable.$refs.dataTable.clearSelection()
       this.screenPageObj = { ...this.pageObj }
-      this.$refs.screenPagination.pageSize = this.screenPageObj.pageSize
+      if (this.$refs.screenPagination && this.$refs.screenPagination.pageSize) {
+        this.$refs.screenPagination.pageSize = this.screenPageObj.pageSize
+      }
     },
     // 设置数据, filter区分
     setData (chartItem, seriesItem, panelId, filter, area, errorMsg) {
diff --git a/nezha-fronted/src/components/charts/chartPreview.vue b/nezha-fronted/src/components/charts/chartPreview.vue
index 2a0d68bed..efa8ab19b 100644
--- a/nezha-fronted/src/components/charts/chartPreview.vue
+++ b/nezha-fronted/src/components/charts/chartPreview.vue
@@ -358,7 +358,9 @@ export default {
     },
     initDialog () {
       // 此时初始化，才能获得screenShowArea对象，否则此对象为undefined，无法初始化图表
-      this.$refs.pickTime.$refs.timePicker.setCustomTime()
+      if (this.$refs.pickTime) {
+        this.$refs.pickTime.$refs.timePicker.setCustomTime()
+      }
       const chartType = this.chart.type
       if (chartType === 'table') {
         //
diff --git a/nezha-fronted/src/components/layout/header.vue b/nezha-fronted/src/components/layout/header.vue
index 2fab36317..726ec485e 100644
--- a/nezha-fronted/src/components/layout/header.vue
+++ b/nezha-fronted/src/components/layout/header.vue
@@ -74,7 +74,7 @@ export default {
   },
   data () {
     return {
-      username: sessionStorage.getItem('nz-username'),
+      username: localStorage.getItem('nz-username'),
       name: localStorage.getItem('nz-user-name'),
       language: localStorage.getItem('nz-language') ? localStorage.getItem('nz-language') : 'en',
       // 顶部菜单相关